This is a very nice vintage Coro adjustable choker length necklace.  A very tailored style, gold tone metal swirls are set with imitation pearls in graduated sizes and accented with a line of clear baguette stones then finished with a faux pearl drop at the center front.

This lovely necklace measures 16 ½” in length and the center ornament has about a 2” drop.  Signed Coro in script and Des. Pat. Pend (barely legible).